Needs and trends in rational synthesis of zeolitic materials

2012 ◽  
Vol 41 (5) ◽  
pp. 1729-1741 ◽  
Author(s):  
Zhuopeng Wang ◽  
Jihong Yu ◽  
Ruren Xu
Keyword(s):  
Zeolitic Materials

Nanosized and delayered zeolitic materials for the liquid-phase Beckmann rearrangement of cyclododecanone oxime

2007 ◽  
Vol 250 (1) ◽  
pp. 161-170 ◽  
Author(s):  
P BOTELLA ◽  
A CORMA ◽  
S IBORRA ◽  
R MONTON ◽  
I RODRIGUEZ ◽  
...  
Keyword(s):  
Liquid Phase ◽  
Beckmann Rearrangement ◽  
Zeolitic Materials

Thorium and uranium uptake by natural zeolitic materials

1995 ◽  
Vol 173-174 ◽  
pp. 237-246 ◽  
Author(s):  
P. Misaelides ◽  
A. Godelitsas ◽  
A. Filippidis ◽  
D. Charistos ◽  
I. Anousis
Keyword(s):  
Uranium Uptake ◽  
Zeolitic Materials

Synthesis and characterization of BEC-zeotype germanosilicates and B-substituted zeolitic materials

2016 ◽  
Vol 23 (3) ◽  
pp. 647-654 ◽  
Author(s):  
Lei Shi ◽  
Yubin Yuan ◽  
Na Zhang ◽  
Sen Lin ◽  
Tingting Yu ◽  
...  
Keyword(s):  
Synthesis And Characterization ◽  
Zeolitic Materials

Metallic Particles Supported in Several Synthetic Zeolitic Materials

1990 ◽  
Vol 183 ◽  
Author(s):  
Dwight R. Acosta ◽  
Miguel J. Yacaman
Keyword(s):  
Electron Microscopy ◽  
High Resolution ◽  
High Resolution Electron Microscopy ◽  
Metallic Particles ◽  
Resolution Electron ◽  
Zeolitic Materials

AbstractHigh resolution electron microscopy observations were carried out in several zeolitic systems with different supported metallic phases in order to determine besides distributions of metallic particles, possible preferential orientations of metallic phases during impregnation processes and to detect some crystallographic relations between metallic particles and support.

Catalytic behaviour of molybdenum-based zeolitic materials prepared by organic-medium impregnation and sublimation methods

2019 ◽  
Vol 17 (5) ◽  
pp. 1087-1101 ◽  
Author(s):  
Emna Mannei ◽  
Faouzi Ayari ◽  
Esther Asedegbega-Nieto ◽  
Mourad Mhamdi ◽  
Gérard Delahay
Keyword(s):  
Organic Medium ◽  
Catalytic Behaviour ◽  
Zeolitic Materials

Novel heterogeneous catalysts in the wet peroxide oxidation of phenol

2001 ◽  
Vol 44 (5) ◽  
pp. 153-160 ◽  
Author(s):  
G. Ovejero ◽  
J.L. Sotelo ◽  
F. Martínez ◽  
L. Gordo
Keyword(s):  
Heterogeneous Catalysts ◽  
Mixed Oxides ◽  
Isomorphous Substitution ◽  
Phenol Removal ◽  
Metallic Ions ◽  
Peroxide Oxidation ◽  
Reaction Conditions ◽  
Wet Peroxide Oxidation ◽  
Cu Catalysts ◽  
Zeolitic Materials

Catalytic wet peroxide oxidation (CWPO) of diluted aqueous solutions of phenol has been studied over a series of heterogeneous catalysts at 100°C under 1MPa air pressure. Several catalysts were prepared and tested including zeolitic materials exchanged with metallic ions such as Fe and Cu and different mixed oxides. Likewise, a Fe-TS- zeolite was synthesised by isomorphous substitution of Si atoms by Fe and Ti into the MFI zeolitic framework through hydrothermal synthesis of wetness-impregnated Fe2O3-TiO2-SiO2 xerogels. This material showed a complete phenol removal and TOC reduction of up to 68% under the reaction conditions, with a low leaching of iron species as compared to Fe-exchanged zeolitic materials. Perovskite of type LaTi0.45Cu0.55O3 was also tested, showing copper leaching of 22%, with a TOC conversion of 93% and total phenol removal. The capacity of Fe and Cu containing catalysts to promote free radicals in the presence of H2O2 as well as the thermal decomposition of the oxidant under the reaction conditions have also been studied. In the absence of hydrogen peroxide, Fe and Cu catalysts were not effective in order to decrease TOC content.

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